Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ea919e8827f3735d502ea481653ed3f44abd627cca2faef3fd5e8796c1659ff' 
  AND token = 'Cvk1Lp1tgtdkTqzHBW/L+T3syIFofvOrdEUTaOY0S2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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