Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2838f126757c368ff9c658596483f662c92a89ab90befcd5c45d29a37d907d68' 
  AND token = 't5ub5XhHIeD218cpTC97gIt0qdjiJPfw70h4BiEn0Qg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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