SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'bdea2d4b2fa0e3e0d8680dfd9fa91788d60ff85e250088307305c666d5c7d194' 
  AND token = 'jCFvYc+tz56Ct58DZpfx6WZB/o5BYPevwNpFZeyWK+I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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