Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21349ba4e946101060b088061a8cebebfac77dbab9b803b37cd210028e96a9fd' 
  AND token = 'GkB/OMg73Mvudu2FQ6P33NVzzOB0zmfApOftY1Q3vY0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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