Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '51549647509560a2673133ee9c8e1c33b53a00a1be7ca1e1cf2f6e372f888496' 
  AND token = 'e9FYGt+G4HxCWfnVZP3pkDLxzEH5BQWc1Kk9q3nScPs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}