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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '96e1ea632b8f7da185ec0d3da81e5bf9139e2d2268c727ce2481c2bce8a2998e' 
  AND token = 'O9PHaJu+iYx95ryZeqOaIUuPZqLBWbQUgpqTx/1Eow8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00108

JSON explain

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