Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b08aa35d33a6b0445e8dd067dcae8613c2178cb7b6799b4624ba33a2f419d9e5' 
  AND token = 'fNykmHjppK8rvHrRc6SM03erH4ht3PsLsiop6qZi97M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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