Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1c16f71b4d41b6210ff5361f2965a638132a7ed1665c69d392fc3a8d05b5eac' 
  AND token = 'WFMDgcEFhP9saF5yp0hazZKwayt/oWv6pGWCv3rrkHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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