Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dc944179e2c3898f61637e25d41f9b63b588de22241b7f238552a9000d6915a0' 
  AND token = 'LGErbz592sY4u/clz7F+5FhHU2Nw8C2RwCRl4oluODo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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