Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20e12702104d33242d88bec0f9c2254103a8bbec39a5f15d9a48be4183efd0a2' 
  AND token = 'd1L7warZAJMTl9x4kPyEVvcNQs6JiiaMXkw//era4SQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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