Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fab5378191bf8aec2b5a22721d703929039ece5e1d4c739ad3327c13148d2b6' 
  AND token = 'hTubZz5yhDHgfZvymMTbZLzaU2sVUiDuPdkLl98wap4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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