Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e68d190ed567b0fa4776e4f6e41e727ff1971bf8535031fcf9e372d4e6f1daf' 
  AND token = 'pq9UcluxIHI1r1+6vugLgsKbbx4SW14S9LBrwvImsaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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