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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8654ff27f4ea310e34f1e7e7ecead910f36d3adaf0ed5edd107a5ed2710ae1d8' 
  AND token = 'izZjh+RzsNxRgrEoLJBdVpX8PgpkqzoGpvfde6w5Ymo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00065

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}