Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73387279316363dfd99632779fddf17ddca0242f2bac2b633a445e7f244762f4' 
  AND token = 'w9XijHjlnzvMkfgTQyc3yu5d3W2xlCM2wvq1tgcNrTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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