SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd10f863515cfb3591c36f2b4d0475d58fb912e58a31e78824d3f3206a63921b7' 
  AND token = 'jK09BDn2JJq/nCehJserlJw6phbL1FCfSX7g3o9x64I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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