Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b5306d30dc3073d3aeed75cca409554a2ba33a7182c85a6bfa696b753fd11bc7' 
  AND token = 'W55CZAzYU+rYq2q8EfYRsG0t83ItZ5Ychjc1H9vyBfQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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