Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c6ebff9c7a3af467f0e09d0b81791eac9f40df0c74e5e9984e7ba86b4933f2f' 
  AND token = 'dh4Nn7qNH8l0QtBeGOO93y2FjXcnwlQcqxdFLgYs91E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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