SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64565d553d4c23cfd362602c95baa1799c14e117ea9865dd6621c58a8a89efac' 
  AND token = 'VYGLjlX7VRSzlXRwuglmEI5b+9yJ0QEOm1sKAj2AeGM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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