Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c62a6b87acad2a50deae123b427a1a471e616b31281ebbc1eaf69013dc19797' 
  AND token = 'vCbmOMmllh4mg+KQCYYGI0/iY2XUhH7jRqBRbYzYbR0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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