Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '377d6ec34fcfabe320a2108c96260d6351a6e4b5287bab41d2121462b71ef8c1' 
  AND token = 'k7D+EFlw6nq47VP9M7ec4T9aVGOaQwle3aHp0nrOcmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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