Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95b0673e4a411290259944d2f6f020e44fa69cf62e2a0b6b844ec22dece82a34' 
  AND token = 'pDb/sNqwB3ukLO6ZCRHXueY1w7sAgoe62+My2kPrfzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00052

JSON explain

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