Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'cd595cf0c5686d67e375d886296c65c0c0c34a883bdc75e80741f3699147d3e5' 
  AND token = '1Z1eUjd3cyHmd8tnaE3fNvb2UI8AYO8p+wu3K5i2k2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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