Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f722459e744155669a2896fbb0ff1bf250cc5cf6ed64c07f3b95fa391aceb79' 
  AND token = 'SAS+fR36y7nMfLibiVBSz41YlLnt9O2w5Yk56t27nU4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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