Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '01c4400b724b4dce899f56542d6846bc0e671ad3e5afa27ac9c64544ecae7121' 
  AND token = 'ctMqjw+2kJ8XfGoLkhnhvtgMmrm1/tmFVH4Xe17lft8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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