SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '05bcb6b2a65d6be26e3f10ff5f8236751b75d83809f271ac6b9f5f743bf27bd5' 
  AND token = 'D/jRpT07FU4DGiTwuu78ok9l6z+iaP+W8kwXwBnq6v0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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