Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3e74936f4783b2fc0e9514863f40cb762fbd69095f52af1bbce9695396122c2b' 
  AND token = 'f91o/N7+1SqqFb3mBDvJPDACRDC2cLaR5MIOEND4I5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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