Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '57c4f4d4179da70c49ea19cf5e7114222aa5716adedd39b73249da0b1b61f12e' 
  AND token = 'e/dAPfW8DSGJeb20aY37uZuHB+JzNpkpxNGYZtw+cGQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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