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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '174f2f29ab198a1545e29ecc80175528424b2ac61d84866a06102261c71fbfdd' 
  AND token = 'dfp64qrv3Kl9r82zn5xIaJSvF9auZKdcz3fNYUFv0Z0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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