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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95081f77b1950f26deb917c8cef9926473de7d112082eaec479545a3b8f7e803' 
  AND token = 'rDKXMDugb33KsJ1h+J1ir3hyWFlb90DscZix1387TJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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