Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a3d22136efd399c3a7230814d2ed58add65a3708fd5a7ec11b3c27dc927d2627' 
  AND token = 'FJtjQkgVQaIjSQZm16/9ALfmk0QL9HlkiZvmeZTz/D0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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