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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c54366a097edb2026e12da8ecc3b0d26d3b1faa567677d9022c319435231b94b' 
  AND token = 'Ws5kyKaX5RbU9ZL12jbS48t2HddArDOf6Ph82Jgy6PU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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