Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0699f5ff000cbb3dbf510a9b32588d29df8c23c8c05fa02da8a25a4d4e3cd8f1' 
  AND token = 'j1wvnb7o/SoLxECKYC220dac8P0CE6kS1nVao73/wgY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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