Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01656868ce7e44f5e44c787cd23f007983157c2759e5ec9c7f9fd4f2622a47c5' 
  AND token = '+xIzB+RNWS2cISVe0vjGLzxqh4rCUeDhy2jokWLjiXo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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