Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27c9b6e19e69f9be143265b5d9a8a99902ecd6791f1ed72340bb38b6b571092a' 
  AND token = 'jgsNBbQC2lqD0rfZ+8oowCvQ6zgB+w8kelomIQk7MWk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

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