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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09bb2767afbcc3ff58ab1e07b9b167b95e9ce88d7c53f1226eee29f970d359d7' 
  AND token = 'm1sQjZpaZlNmzqJX7eqcdO+0vS37K3lNEtS+Oa0OsBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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