Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8cd5940859d438948a0c05495527e3266de07230d2ef15e57129fb39fffa2aa6' 
  AND token = 'Ba2Ky7e0kRQApdQLw4NeoQhdVxi5z5ScRgLYZXcVhec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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