SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b9f5555318bbf2774bc6919c2f2cd42354927fc5d17dc7da54fab3c26ab37130' 
  AND token = 'BlSfZOOvsvK+zfjMpam/0bG8fAM5UfkPYisd0g/dBF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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