Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8ce37089ba6866d72b57acb6fa324084cd1f12c5b99631796967ef3764a3d4a' 
  AND token = 'ngnvEOW626RL8lkCYRd2cl7Qh/azIme/Ab+6egucxg4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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