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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0219f07f2358c5ecdfa4e3125c4e00ea752dcc42118107676943232cc6ec93ac' 
  AND token = 'l9h0ahg6/Obbf318I2CBrqWADh6FnlhKyh5lCHkMrDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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