Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e6c844f18536403414953209869a07923a5d069100592e18c0c086582ae8729' 
  AND token = 'U6Di3/pzxU79v/oBUqoQlef4r0huJXOkeopdmmI/Mhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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