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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fbf94b392cf7a23bbb58466525d58c627ddde64f25b050b29512beb9e0466f31' 
  AND token = '3eeMRj6wSpMvvZs9rQQ8f/dCgATrdQWnE+Sp9JlHSgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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