Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '31fb4680c2ef9dc7236f82251e2010811eaee5222f5db96ac0fd81b6410d1bc6' 
  AND token = '7Fma9J/HPvXtpdQ9oe1bzBQ4YBWe1ao5+wEnxnH/ktk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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