Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dab8ef5aece761a350a175a861d3df26e44fa85605f906c22be6637db116cc04' 
  AND token = 'BtyhjtanSAQ4tcmN2XULQix9zEl94VBO6Iu5z9Tklac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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