Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8dba89dd4c9be8d4eeae7d4f4c4bfbd3e27d86600ed6dcfea9cea48ee1d45b12' 
  AND token = 'EDFDOSZsTa8ZlcA9vdMZ0/B6C4R4RUXPs/UQNo7w/8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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