Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '482f13a7d2bfaf7a268a4aa4996dc2afa21a6eb3a1debafcd7b106299d378588' 
  AND token = 'Xskyjor6rRdb1zNTD6uRhubDpNdhikj8g92IK9/tLfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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