Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f182f9beb8111107f3d741309a351ae6c5c119b32d51e8d7af3827a0a5968c95' 
  AND token = '1s5DlMAyPea58kAygEpmECfIXDKC2zHpTXpgBpPUlgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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