Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '636b8c6c92fb2180af74430fe2d540de4618fbecca4c1add9b38f42c2a22830e' 
  AND token = 'S9yzwNKXbBdmMfP6gXRJBBwJlNmQ8r+h28EjO1Aar1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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