SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5450d42431b01f82df32d3b383f5ba83e90d056998c0f27b1eb58bf98272f267' 
  AND token = 'Jl9q7Vf5QfP36f7+w7hYBc7qcj/6X2R7CzJiqIIqIpM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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