Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdf3bbcedb949e059434da89c100e678cbba25d844a61492f5d1867ccab92c89' 
  AND token = '24tNnH9paIV0ifvzs8hxWQDaL/qYZYY5GrLM2980gSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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