SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fd2319f12c47301c52e9c6bfa70ad13432204837ce4b4035ba396f8d4c2aaa4' 
  AND token = 'FKQbKurIXiBju81Kk4tU60ipJTgFBhjl/uCwvESmHwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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