Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47b1682b3522c1c9aa37da0d57cff4b2b548689e28a34579cadf28255fc7f829' 
  AND token = '2CxLxTnw7MGiyy00NDvRenf/ThxlQcn8wl8T1MSbbnY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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