Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32c0f9c14f338da258e356d41a4ec98110647f224ec3bbe28ccfdf2b1dca06e9' 
  AND token = 'k3qnT0sc6lx8JeglhdTLIxcHiLTrXXIgayjSpeuQlao=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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