Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae37a5d6d3aa80e294cccee15b87b735cf85ad26e0253837b3d4a492e9f30b1b' 
  AND token = '7YUM8Et80qjwaorUikqkoC1PN0l4GmlSn2dmojgyQ3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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