SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fd69d5e471d246141f8724163865887c08d206bb27fb23ef96b76ba985fc909e' 
  AND token = 'vqAtSZZYmTLI2XYapKelsRsGMX5syJiIxFVFqGMeynI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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