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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '072db719171b3c7aa5ff894de18f09c6072c0a742a3d765f1f419731b182ee7c' 
  AND token = 'qxF0hETZjoYLksTWe3cJN4RMG2sMXflI8Db5gEeM0Gw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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