Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de809c9b0e2e2623449c710c114f2083e2d4170311f428682f8028854e8c763b' 
  AND token = '3OF3Z/B4XA5N/Lsm5+R71J22PBewkBrEWO9V/ppl+2k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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