Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '005d4e26dce99b7a8bd5ce7a879dc30600feb357977ffadd8330af2cbc04b148' 
  AND token = 'EkErRe559nlCEyJduGu369Im4cHTJ88DkHajcN98XMw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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