SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '576d1217e9824936958ba9ec8805159840ed359284fdaf5b46f1cb70fbcf97fc' 
  AND token = 'g9Pp+3T2l1hBRbAzF3X+3ozp6j1Opm6NdV1xNKYX9aY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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