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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a083a61bbf0dd6bf08062accf1abccd6145d5820b4bc1979912dc4555c077911' 
  AND token = 'OZoniaDFiEOFU2VOtuTHrVNfLhpdSmgIQ7pOB46lIuw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00593

JSON explain

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