Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a2815ffde5284b313e68159b8bad65091d4082d5e9d0432cfdaa814116ebac0b' 
  AND token = 'wyUXSBr4MMs9Jf4Bxh2lfxOmUdulCczQf9aPWDK9zeE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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