Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c51cc0aeb5b59dd7cebfad424bb8db71a1e62a5aba957959ceda90c63149e060' 
  AND token = 'N2E9vKJvcEKY1G6O9lmT8lw7/D7/G8B0QoI2DfKD+j4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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