Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'deafde5536232476e601e2801344783b8e84dc4cce758d3ba1beda64238ef9c1' 
  AND token = '7F1pvFojpEheXXz8vTi1+flUqyBcWSgPqLSUmXiT1BA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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